CVE-2026-98481

Description

In the Linux kernel, the following vulnerability has been resolved: nfc: port100: reject frames whose declared length exceeds the received data port100_recv_response() passes the URB transfer buffer to port100_rx_frame_is_valid(), which checksums le16_to_cpu(frame->datalen) bytes of frame->data. datalen is a 16-bit field supplied by the device and is never checked against the number of bytes actually received (urb->actual_length), so a device reporting a datalen larger than the received frame makes port100_data_checksum() read out of bounds past the transfer buffer. Reject a response whose declared frame size does not fit the received length before validating it. Found by 0sec (https://0sec.ai) using automated source analysis; the missing bound is evident from source. Compile-tested.

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EPSS — Exploit Prediction

0.0022

Probability of exploitation

0.12%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/035056e07ea65be670284246d9bc62f2f00ff4a3 https://git.kernel.org/stable/c/092c6a605cbd6414ef499834c2e0da69c2c3388e https://git.kernel.org/stable/c/0d482995f0cdd0302450aa300c684c642d8ab31f https://git.kernel.org/stable/c/144ad477c381e2c592b64898d04ab4ce03b32861 https://git.kernel.org/stable/c/14b1467cfc6630583650f33538174c5a1ec685ab https://git.kernel.org/stable/c/9e8df087826b9999d1b83b06f5d85675d5a69c9e https://git.kernel.org/stable/c/db66a30588630c7de30ef033f00daddef69f6ad9 https://git.kernel.org/stable/c/e4da1452e10c6472a4bac48dc2f6a35fff1fcd69

Frequently Asked Questions

What is CVE-2026-98481? +

In the Linux kernel, the following vulnerability has been resolved: nfc: port100: reject frames whose declared length exceeds the received data port100_recv_response() passes the URB transfer buffer to port100_rx_frame_is_valid(), which checksums le16_to_cpu(frame->datalen) bytes of frame->data. datalen is a 16-bit field supplied by the device and is never checked against the number of bytes actually received (urb->actual_length), so a device reporting a datalen larger than the received frame makes port100_data_checksum() read out of bounds past the transfer buffer. Reject a response whose declared frame size does not fit the received length before validating it. Found by 0sec (https://0sec.ai) using automated source analysis; the missing bound is evident from source. Compile-tested.

How do I check if I'm vulnerable to CVE-2026-98481? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.